Description
MIT Kerberos 5 (aka krb5) 1.7.x and 1.8.x through 1.8.3 does not properly determine the acceptability of checksums, which might allow remote attackers to forge GSS tokens, gain privileges, or have unspecified other impact via (1) an unkeyed checksum, (2) an unkeyed PAC checksum, or (3) a KrbFastArmoredReq checksum based on an RC4 key.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | krb5 | 1.8.3+dfsg-3 | — |
| Debian 13 | krb5 | 1.8.3+dfsg-3 | — |
| Debian 12 | krb5 | 1.8.3+dfsg-3 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | krb5 +6 | 1.8.2-3.el6_0.3 | RHSA-2010:0925 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | krb5 | 1.15-1.1 | openSUSE-SU-2024:10004-1 |
Advisories 3
- RHSA-2010:0925 Red Hat Security Advisory: krb5 security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- openSUSE-SU-2024:10004-1 krb5-1.15-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2022-0602 IBM Security Verify Access: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 17, 2024
References
- ADV-2010-3094 vdb-entry
- http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
- MDVSA-2010:246 vendor-advisory
- FEDORA-2010-18425 vendor-advisory
- http://kb.vmware.com/kb/1035108
- ADV-2010-3118 vdb-entry
- oval:org.mitre.oval:def:11936 vdb-entry signature
- ADV-2011-0187 vdb-entry
- 20101130 MITKRB5-SA-2010-007 Multiple checksum handling vulnerabilities [CVE-2010-1324 CVE-2010-1323 CVE-2010-4020 CVE-2010-4021] mailing-list
- SUSE-SR:2010:023 vendor-advisory
- http://www.vmware.com/security/advisories/VMSA-2011-0007.html
- APPLE-SA-2011-03-21-1 vendor-advisory
- 69609 vdb-entry
- HPSBUX02623 vendor-advisory
- http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2010-007.txt
- ADV-2010-3095 vdb-entry
- 42399 third-party-advisory
- 45116 vdb-entry
- [security-announce] 20110428 VMSA-2011-0007 VMware ESXi and ESX Denial of Service and third party updates for Likewise components and ESX Service Console mailing-list
- 1024803 vdb-entry
- 20110428 VMSA-2011-0007 VMware ESXi and ESX Denial of Service and third party updates for Likewise components and ESX Service Console mailing-list
- FEDORA-2010-18409 vendor-advisory
- SUSE-SR:2010:024 vendor-advisory
- RHSA-2010:0925 vendor-advisory
- USN-1030-1 vendor-advisory
- 43015 third-party-advisory
- http://support.apple.com/kb/HT4581